objdump

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objdump is a program for displaying various information about object files. For instance, it can be used as a disassembler to view executable in assembly form. It is part of the GNU binutils for fine-grained control over executable and other binary data.

For example, to completely disassemble a binary:

objdump -Dslx file

objdump uses the BFD library to read the contents of object files. readelf, also included in the binutils package, is similar to objdump but it can only read ELF files and it does not use the BFD library.